Air-compressor.



' PATENTED. JULY 21.1903.

e. 001m. AIR COMPRESSOR. APBLIOATION FILED SEPT. 15, 19 02.

SHEETS-SHEET 1.

H0 MODEL.

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m: uunms PETERS co, PHoTouTua, WASHINGYON. 0 cv substantially as hereinafter described and UNITED STATES Patented July 21, 1903.

PATENT OFFICE.

GEORGE CODE, OF MELROSE MASSACHUSETTS, ASSIGNOR, BY DIRECT MESNE ASSIGNMENTS, TO UNITED STATES ATMOSPHERIC OXYGEN COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MAINE.

AIR-COMPRESSOR.

SPECIFIGATION forming part of Letters Application filed September 15, 1902 To 00 whom it may concern.-

Be it known that I, GEORGE CODE, of Melrose, in the county of Middlesex and State of Massachusetts,have invented certain new and useful Improvements in Air-Compressors, of which the following is a specification.

This invention relates to air-pumps, and has for its object the production of a machine or apparatus of this character in which the utmost uniformity maybe obtained in the operation of the machine, both as to theapplication of power and the output from the ma-- chine.

To these ends the invention consists in the construction and combination of parts,

claimed.

In the drawings, Figure 1 represents a plan 7 yiew of an apparatus embodying my invention. Fig. 2 represents a section on line 2 2 of Fig. 1. Fig. 3 represents a section on line 3 3 of Fig. 2.

Similar reference characters indicate similar parts in all the figures.

Suitable frame-standards are represented at 4 4 44. These frame-standards are suitably supported upon a floor or base. Preferably two of the standards are much less in width than the other two, for the reason that while the two elongated standards support a counter-shaft,as well as partially support the two short shafts hereinafter-described, the two narrower standards are needed only to support the short shafts. A power-shaft 5, having its hearings in two of the standards, is provided with a driving-pulley 7, a gear 8, and a hub 9, these three members being rigidly secured to said shaft. A driven shaft 6 is supported in the other two standards 4, the two shafts 5and 6 beingsupported end to end, but out of alinement with each other, for a purpose that will presently appear.

Radiating from the hub 9 are rigid arms 10, the outer ends of which may be connected and braced by a ring. (Indicated by the dotted lines 11 in Fig. 2.)

Secured to the inner end of the driven shaft 6 is a disk 12, on which are secured air-compressing cylinders 13, preferably curved lon- Patent No. "134,303, dated July 21, 1903.

. Serial No. 123,396. (No model.)

, gitudinally, as indicated in Fig. 2. All the cylinders are mounted on the disk with their bores in the direction of their path of travelin other words, all face in the samedirection around the axis of rotation of the disk. I Each cylinder 13 is provided at its rear end with a chamber 14, with which the interior of the cylinder communicates by means of a port or passage, to which is fitted a valve 15, provided with a suitable spring 15' to cause said valve to act as a check-valve. Each chamber l-t is connected, by means of a pipe or duct 16, with an axial port or passage 17in the shaft 6, the outer end of said axial port communicating with a tank or reservoirp18 "for the air .or other fluid being pumped. .65

Each cylinderis provided witha piston 19, having a port 22, provided with a check-valve at its inner end, and with a piston-rod 20, the outer end of which is shown as bifurcated to receive the rod 10. Within the bifurcation 7c of the piston-rod two rollers 21 are mounted, one each side of the rod 10, to reduce fric-' tion.

Secured on shaft 6 is a gear 23, which is of the samesize as the gear 8 on the shaft 5. The two gears 8 and 23 mesh with equal gears 25 on a counter-shaft 24, having hearings in the extended portions of'the longer framestandards 4.

It will be readily understood that the coun- 8o tor-shaft 24: and its gears 25,meshing with the gears 8 and 23, insure absolute uniformityin the speed of rotation of the two shafts 5 and 6. Therefore when power is applied, by means of the pulley 7,to the shaft5 the disk 12, with 8 its cylinders, is-rotated at the same speed as the arms 10, carried bythe hub 9 on the shaft 5 but owing to the eccentric mounting on the two shafts 5 and 6 the rods 10 cause the pistons and piston-rods to reciprocate relatively 0 to the cylinders as the parts rotate. This is due to the fact that although the two shafts rotate at the same speed the eccentric mounting of the two shafts causes the engagement between the rods 10'and the piston-rods to 5 vary in their distance from the center of rotation of the rods, thus causing the relative motion of the pistons and the cylinders to vary according to the varying distance of the point of engagement between the rods lOand the piston-rod from the axis of the shaft 5.

It will be readily understood that the pump action of the different cylinders, of which there may be four, as shown, or more, takes place successively or one after another as they rotate. Therefore before one piston has ceased its compressing action the next one has moved a portion ofits compressing stroke, thus producing a uniform orsteady compressing effect through the port 17 into the reservoir or tank and also preventing any irregularity of motion due to the back pressure of any of the series of pumps.

I claim 1. A pumpingapparatus comprisingarotalively-mounted cylinder and piston, and a rotatively-mounted actuator for said piston, one axis of rotation being eccentric to the other,the cylinder being mounted withits bore in the direction of its path of travel.

2. A pumping apparatus comprising two shafts mounted end to end but out of alinement with each other, means for insuring uniform rotation of both shafts, adisk carried by one shaft and having a plurality of cylinders all facing inthesamedirection around the axis of rotation of the disk, pistons in said cylinders, and connections between said pistons and the other shaft, whereby said pistons and cylinders are caused to relatively reciprocate.

3. An air-compressor comprising a plurality of pumping-cylinders mounted to rotate about a common axis and all facing in the same direction around said axis,pistons in said cylinders,a driving-shaft eccentric to the axis of rotation of the cylinders, and connections between the driving-shaft and the pistons for causing the latter to reciprocate relatively to the cylinders.

4:. An air-compressor comprising a driven shaft having a disk provided with a plurality of cylinders all facing in the same direction around the axis of rotation of the disk, )istons in said cylinders, a driving-shaft eccentric to the driven shaft, and connections between the driving shaft and the pistons, whereby the latter are caused to reciprocate relatively to the cylinders.

5. An air-compressor comprising a driven shaft having a disk provided with a plurality of cylinders all facing in the same direction around the axis of rotation of the disk, pistons in said cylinders, a driving-shaft eccentric to the driven shaft and having arms radiating therefrom, piston-rods connecting said pistons and arms, and means for insuring uniform rotation of the two shafts.

6. An air-compressor comprising a driven shaft having a disk provided with aplurality of cylinders all facing in the same direction around the axis of rotation of the disk, pistons in said cylinders, adriving-shaft eccentric to the driven shaft and having arms radiating threfrom, piston-rods extending outward from the pistons and having theirouter ends bifurcated, rollers mounted in the bifurcations and adapted to engage opposite sides of the arms, and means for insuring uniform rotation of the two shafts.

7. In a pumping apparatus,the com bination with the shafts 5 and 6 mounted end to end but out of alinement with each other, of arms radiating from the shaft 5, means for rotating said shaft, a disk having a plurality of cylinders and secured to the other shaft the cylinders all facing in the same direction around the axis of rotation of the disk, a central port in the cylinder or driven shaft, ports leading from the cylinders to said shaft-port, a reservoir or tank connected with said shaft-port, pistons in the cylinders, connections between said pistons and the radiating rods of the driven shaft for causing the pistons to reciprocate relatively to the cylinders, gears carried by the two shafts, and a counter-shaft having gears meshing with the gears of the driving and driven shafts.

In testimony whereof I have aflixed my signature in presence of two witnesses. 

